You can use the DROP command in dbisql to remove the database files (temporary files, Sybase IQ database files, and catalog files) for a database.
Start the server without a database (the preferred method) or with a different database than the one to be dropped.
Start dbisql, if it is not already running.
For instructions, see Connecting to other databases from Interactive SQLin System Administration Guide: Volume 1. If no database was specified, the utility database is used, and the Database Name must be set to utility_db.
Type the following command:
DROP DATABASE “<DBname>”
For more details about this command, see Reference: Statements and Options.